I've got a 1954 Primus 41. It's nice to have a roarer at last. Does anyone still use theirs? It should last a good while on a single filling.

I use mine all time. In fact, its my favorite stove, just the right size and simmers perfectly, economical with fuel and fits in my pack or the saddlebag of my motorbike.

I have 2 - one mint in the collection & one that I use a lot. It stays in the car. Both mine are also the roarer version. For a stove that has a tin that acts as a windshield I prefer to the 111.

The Primus 41 is a dream, it fires up without any pumping. This is my first roarer, and unless I'm mistaken it seems to give off less paraffin / kero smell than silent burners. Has anyone else noticed this? The only strange smell given off was the fuelite (white gas) odour evaporating from the case. Apparently the stove had been used with this in the past. Had quite a job empying it all out of the tank and drying it off before puting the kero in.

So I popped my billy (old large peach can) on the stove and had a brew-up.

There's a slight leak on the filler cap, and I'm toying with the idea of putting an O-ring inside the cap. Has anyone tried this?

Dave.

Look for 3/16" to 1/8" dia. Volcanised rubber. I had one in my 8R, 111B and my 00. they work beautifuly. A wee bit better than the originals, I dare say.

Use automotive o-rings. They work well. General purpose or plumbing orings aren't always made of petroleum resistant rubbers and can fail.

J

Exactly WHICH O rings to look for, Thank you again.

O-rings are formulated for different types of petroleum products. In the US, look for a Milspec number. MIL-P-25732 is for use with hydraulic fluid. MS28778 is good for hydraulic fluid up to 160 degrees F. MS29513 O-rings are fuel resistent. A good supplier of the fuel resistent type is www.aircraftspruce.com.

My local tool supply store recommends Viton 0-rings for petroleum products.

Dave.

I had some fun removing the dried up old seal from the filler cap. Until I got it out I didn't realise how hard and useless it had become.

I found that by drilling a couple of 4mm holes nearly all the way through the seal I could easily break it up by putting the nose of a pair of long nose pliers into each hole and opening the pliers.

So in the place of the old seal I popped in one of my new Viton 5/8" O-Rings, and what a revelation. I left the stove roaring away on the bench for a few minutes with no pressure loss. Previously I'd return to a sad yellow flame with more of a whimper than a roar.

Dave.